Graph-based prior and forward models for inverse problems on manifolds with boundaries
Graph-based prior and forward models for inverse problems on manifolds with boundaries
复制标题
基于图的先验和前向模型,用于解决带边界流形上的反问题
DOI:
10.1088/1361-6420/ac3994
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发表时间:
2022
期刊:
影响因子:
2.1
通讯作者:
Sanz-Alonso, Daniel
中科院分区:
文献类型:
--
作者:
Harlim, John;Jiang, Shixiao W;Kim, Hwanwoo;Sanz-Alonso, Daniel
This paper develops manifold learning techniques for the numerical solution of PDE-constrained Bayesian inverse problems on manifolds with boundaries. We introduce graphical Matérn-type Gaussian field priors that enable flexible modeling near the boundaries, representing boundary values by superposition of harmonic functions with appropriate Dirichlet boundary conditions. We also investigate the graph-based approximation of forward models from PDE parameters to observed quantities. In the construction of graph-based prior and forward models, we leverage the ghost point diffusion map algorithm to approximate second-order elliptic operators with classical boundary conditions. Numerical results validate our graph-based approach and demonstrate the need to design prior covariance models that account for boundary conditions.
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影响因子:
6
作者:
Garcia Trillos, Nicolas;Kaplan, Zachary;Samakhoana, Thabo;Sanz-Alonso, Daniel
通讯作者:
Sanz-Alonso, Daniel
影响因子:
1.5
作者:
D. Bolin;Kristin Kirchner;M. Kovács
通讯作者:
M. Kovács
DOI:
10.1137/19m1295222
发表时间:
2019-10
期刊:
ArXiv
影响因子:
--
作者:
J. Harlim;D. Sanz-Alonso;Ruiyi Yang
通讯作者:
J. Harlim;D. Sanz-Alonso;Ruiyi Yang
影响因子:
14.2
作者:
Dziuk, Gerhard;Elliott, Charles M.
通讯作者:
Elliott, Charles M.
影响因子:
2
作者:
Bertozzi, Andrea L.;Luo, Xiyang;Zygalakis, Konstantinos C.
通讯作者:
Zygalakis, Konstantinos C.